Department of Physics, Northeastern University, Boston, MA 02115.
Department of Physics, Northeastern University, Boston, MA 02115
Proc Natl Acad Sci U S A. 2018 Jun 26;115(26):6650-6655. doi: 10.1073/pnas.1715810115. Epub 2018 Jun 11.
Inspired by how cells pack in dense biological tissues, we design 2D and 3D amorphous materials that possess a complete photonic bandgap. A physical parameter based on how cells adhere with one another and regulate their shapes can continuously tune the photonic bandgap size as well as the bulk mechanical properties of the material. The material can be tuned to go through a solid-fluid phase transition characterized by a vanishing shear modulus. Remarkably, the photonic bandgap persists in the fluid phase, giving rise to a photonic fluid that is robust to flow and rearrangements. Experimentally this design should lead to the engineering of self-assembled nonrigid photonic structures with photonic bandgaps that can be controlled in real time via mechanical and thermal tuning.
受细胞在密集生物组织中如何堆积的启发，我们设计了具有完全光子带隙的 2D 和 3D 非晶材料。一个基于细胞之间如何附着以及调节形状的物理参数可以连续调整光子带隙大小以及材料的整体力学性能。这种材料可以通过一个特征为剪切模量消失的固-流相变来进行调节。值得注意的是，光子带隙在流体相中仍然存在，从而产生了对流动和重排具有鲁棒性的光子流体。从实验上看，这种设计应该会导致自组装的非刚性光子结构的工程设计，这些结构的光子带隙可以通过机械和热调谐实时控制。
